I know with VAG cars it's a doddle to do. Is it the same for a 3 series? I might have to take folding seats rather than cruise as an option on my co. car but would like it retrofitted with my own money (or on company expenses!).

I have been told that if the car is a 4 cyl E90 then all you need is the stalk, new plastics around the seering wheel and coding by the dealer, if you found the part from ebay then probably cost circa £300-400 with stealer labour.